Permutation-lock



2 Sheets-Sheet 1.

(.Modl.)

J. A. PORTER.

PERMUTATION LOCK.

Patented Dec. 4, 1888.

2 Sheets-Sheet 2.

(MOdeL) J. A. PORTER.

PERMUTATION LOCK.

No. 394,009. Patented Dec. 4, 1888.

QWJZZQ/ M N FEIERS. Pnowumo n lwr. washin mmlxc.

NITED STATES PATENT, OFFICE.

JOHN A. PORTER, OF CT. LOUIS, MISSOURI.

PERMUTATlON-LOCK.

SPECIFICATION forming part of Letters Patent N 0. 394,009, datedDecember 4, 1888.

Application filed August 30, 1837. Serial No. 248,246. tModel.)

the following is a full, clear, and exact desm'i 'ition.

The features of the imprm'ement will appear hereinafter, and bedesignated in the claims.

The annexed drawings, making part of this specification, exhibit themost: desirable mode of carrying out the improvement.

Figure l is'a longitudinal section of the lock, its bolt being thrownout. Fig. 2 is a view showing the knob portion of the lock and the partsthereto attached, includin the cam, in plan view, and the casing andbolt in seetion. Fig. 3 is a section on the line 3 3 of Fig. 1, thecasing being broken away. Fig. 1 is a section on the line 4 I of Fig. 1.Fig. 5 is a view in perspective of the cam upon the knobshaft and usedin o erating the bolt, which is shown in perspective in Fig. ti. Fig. 7is a view in perspective of the knob-shaft. Fig. 8 is a view inperspective of the part used to fasten the cam upon the knob-shaft andin effecting the connection between the knobshaft and. the sleevesencirtding the knobsha'tt, and, Fig. 51 is a plan of the band upon eachof the knobalisks.

The same letters of ret'crence denote the same parts.

A, Fi 1, 2, 33,1, and T, represents what may be termed the knob-shaft.It is flanged or provided with a shoulder, a, at its outer end, isslotted at a, and at its inner end it is threadtsl. and provided withthe nut u and washer (l and it passes through the easingB, as shown inFigs. 1 and By meausof a spline, inserted in the slot (1 the cam D,Figs. 1,

2, 2i, and 5, is att aehed to the knob-shaft, so as to be rotated ther(.with. The spline enters the slot (7 in the cam, and it is extended at ein front of the cam, for the purpose presently explained.

E, Figs. 1 2, 3, and (i, represents the belt of the lock. Its movementis indicated by thebroken lines 0/, Figs. 1 and I), and it is operatedby means of the cam I),wh ieh in its rotation works between theshoulders e e of the bolt. The slot 6. in the bolt admits the knob-shaftand provides for the movement of the bolt. Eneircling the outer end ofthe knob-shaft is a series ofdisks, F G ll, Figs. 1, 2, and Lwhich, withthe parts thereto immediately attached, constitute the knob ot' thelock. The outermost disk, F, is provided with a sleeve, f, whicheneircles the knob-shaft, extending thereon to the spline and atf beingslotted, for the purpose presently explained. The sleeve f is alsogrooved atf and the disk F comes against the inner face of theknob-shaft flange o, and

the disk is preferably shaped to include the pcriphery of the flange,substantially as shown. The disk G and its sleeve g encircle the sleeveand the disk .II and its sleeve 71 in turn encircle the sleeve g. Thetwo sleeves 71 extend inwardly evenly with the sleeve 7" and aresimilarly slotted at g 71, res wctively, and the sleeve g is providedwith a stud, 9 which engages in the groove f of the sleeve f, and thesleeve 71 is similarly provided with a stud, 71*, which engages in agroove, in the sleeve g. A washer, I, separates the disks F and G, and awasher, J, separates the disks l and II. Each disk is provided with aring, K, Figs. 1 and 1, having in its periphery a series of notches orperforations, 7.. The rin say by means of the confininga-ingl. and rivet7-is secured to the disk to rotate therewith. Encircling each disk andits ring K is a band, M, Figs. 1., 2, 1, and 5), which, say by slittingit and shaping the slit portion substantially as shown, is provided withone or more inwardlyextending projections, on. These projections, asshown in Fig. 4, engage in the perforations I 7., and thereby the hand Mis secured to the disk to be rotated tln-uewith.

The band M, as shown in Fig. 2, bears a series of numerals, in. Theycorrespond to the perforations 7. in the ring K, and, as indicated bythe broken lines in Fig. 4., the projection or projections in can besprung out of engagement with the ring K, and then the band M can heslipped around upon the disk F to bring the desired numeral of theseries in. into line with or opposite to slot f in the inner end of theslecvef, after which, by releasing the projections m, the band can befastened again upon the disk F. In thisn'ianner all of the disks andbands can be relatively adjusted and the desired combination formed.

The lock is operated as follows: The disks F G H are respectivelyrotatedthe disk'F upon the knob-shaft, the disk G upon the sleeve f, andthe disk H upon the sleeve to bring the numerals or numbers of thecombination to which the lock is set, as described, into line. Thismovement effects the alignment of the slots f g h with each other andwith the part c of the spline O. The three disks can. now be pushedinwardly upon the knob-shaft, and the spline part 0 thereby caused toenter the slots f g 71, and then the entire kn ob and knob-shatt can berotated as one part, and the bolt E, through the cam D, moved in thedesired direction.

To prevent the knob-shaft from being rotated without previously movingthe disks longitudinally inward upon theknobshaft, the bolt E is causedto be held in its out position, Fig. 1, until the disks have been thusslipped inward upon the knob-shaft. This is accomplished,preferably, asfollows: N, Figs. 1 and 3, represents a dog pivoted at n to turnindicated by the broken lines, Ei 1. A spring, it, acts to press theupper end of the dog beneath or within the shoulder e of the bolt E,saving whenits action is overcome. This is accomplished in the presentinstance by means of the projection 01 upon the sleeve h, which, as thesleeve is moved toward the bolt, encounters the lower end of the dog,causing the dog to turn on its pivot and to be dislodged from the bolt,whereupon the dog is free to be moved by the cam. The several sleeves fg it cannot be separately moved longitudinally toward the bolt E becauseof the engagement of the studs 7L2 g in the grooves 9 f respectively.These studs and grooves in no manner interfere with the separaterotation of the sleeves, but serve to prevent the'sleeves from beingmoved upon the bolt E, saving as one part. The part 0 may be a separatepiece from that part of the spline 0 used to key the cam D upon theknobshaft; but it is conveniently made in one piece therewith.

I claim 1. The combination of the knobshaft, the spline 0, provided withthe part c, the disks provided with the slotted sleeves, the rings K,having the series of perforations, and the bands M, having the series ofnumerals m and the projection in, substantially as described.

2. The combim tion of the disk F, the perforated ring K, and the band-M,said .band being adjustable upon said disk and having the projection mand series of numerals m, as described.

The combination of the knob-shaft, the spline O, provided with'the partc, the cam, the bolt, the disks, the slotted sleeves, the projection 12and the pivoted dog, substantially as described.

4. The combination of the knob shaft, the spline C, provided with thepart c, the cam, the bolt, and the disks F G H, said disks be ingprovided, respectively, with the slotted sleeves, andsaid sleeves f 9being respectively grooved at)" and g and said sleeves g h beingprovided, respectively, with the pins g 712, as described.

\Vitness my hand.

J OHN A.- PORTER.

\Vitnesses:

(J. D. Moonv, WM. ASSHETON.

